Lifting-jack



(No Model.)

J. W. CHURCHILL.

LIFTING J-AGK.

Patented Aug. 17, 1886.

2&5

WITNESSES @fi/M.

INVENTOR MMM ATTORNEYS.

UNITEQ YATES.

araNr rrrerjt JOSHUA \VILLIAMS CHURCHILL, OF OLARKS GREEN, PENNSYLVANIA.

'LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 347,570, dated August 17, 1886.

Application filed March 23, 1886.

To all whom it may concern.-

Be it known that I, JOSHUA WILLIAMs CHURCHILL, of Olarks Green, in the county of Lackawanna and State of Pennsylvania, have invented anew and Improved VVagon- Jack, of which the following is a full, clear, and exact description.

My invention relates to an improved form of adjustable wagon-jack constructed so as to be semi-automatic in its operation, as will be hereinafter explained.

Reference is to be hadto the accompanying drawings,forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side view of my improved wagon-jack. Fig. 2 is a central vertical seetional view of the same, and Fig. 3 is a sectional plan view taken on line at x, of Fig. 1.

In constructing such a wagon-jack as is illustrated in the drawings above referred to I provide a heavy base-block, A, and to this block I rigidly secure two vertical standards, Band 0, the standard 0 being somewhat higher than the standard B. A tube, D, is arranged about the standard 0, being stepped in andrigidly fixed to a sleeve, E, formed with lugs or ears F F, and upon these cars there are arranged two chains, G G, the upper links of which are engaged by hooks a a, formed at the ends of the arms I) b of the bifurcated lever H, which lever is pivotally connected to the standard B by means of a bolt or rivet, c.

In the upper end of the tube'D there is arranged an adjustable rod, I, formed with an enlarged head, J, and provided with trans verse apertures t t", similar apertures being formed in the tube D, in order that a pin K, may be inserted, as best shown in Fig. 2, the idea being to make the rod I adjustable.

From the construction described it will be seen that by depressing the lever H in the direction of the arrow shown in connection therewith, the tube D, and with it the rod I, will be elevated; and in order that the parts may be held in the position shown in Fig. 2 I provide a catch-arm, L, that is loosely connected to the base A by screws or bolts (1 (l,

. and at a proper distance above the said base A this arm L is formed with a shoulder, N. The inner face of the arm L normally rests against the sleeve E, and as the tube D is Serial No. 196,252. (No model.)

raised to the position shown in Fig. 2 the arm L will drop forward, so that the shoulder N will fall in below the lower edge of the sleeve E, the lower face of the arm being beveled oil to permit the movement described.

Near the upper end of the arm L there is an inclined face, 6, and upon one side of the arm there is arranged a cam-faccd guide, f, said guide being arm L, and arranged so that its lower edge will project outward beyond the face of the shoulder N when the parts are in the position shown in full lines in Fig. l, a rib or lug, 9, being formed on the side of the arm L in position to support the guide F, as is clearly shown in the drawings.

The operation of thejack is as follows: The rod I having been adjusted to the proper height, its head J is placed beneath the axle of the wagon, and the lever H is then thrown in the direction of the arrow, which movement of the lever will raise the tube D to the position shown in Fig. 2, the top of the sleeve E striking against the guide f, raising said guide so that when the tube has been sufficiently elevated the arm L will drop in toward the tube, so that the shoulder N will be beneath the sleeve E, after which, if the pressure upon the lever is relaxed, the weight of the wagon and the elevated portion of the jack will be sustained by the said shoulder N. WVhen it is desired to lower the tube D, the lever H is depressed to the position shown in dotted lines in Fig. 1, and in being so moved will cause the sleeve E to strike against the inclined face 0 of the arm L, thus throwing the said arm L out from the sleeve E, so that the guide f will be free to drop to the position shown in Fig. 1, after which, when the lever H is allowed to return to the position. shown in full lines in Fig. l, the sleeve E will strike upon the camface 0 of the guide f, so that as the sleeve and tube are descending the arm L will be forced backward upon its loose connection with the base A and the parts will be free to return to the position shown in full lines in Fi 1.

IIaving thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is I 1. The combination, with a base, of standards B and 0, tube D, mounted in a sleeve, E,

pivotally connected to the a lever, II, and connections between the said lever and sleeve, substantially as described.

2. The combination, with a base, of standards B and G, a bifurcated lever H, formed with hooked arms I), chains G G, sleeve E, formed with lugs F, tube D, mounted in the sleeve 15, substantially as described.

3. In awagon-jack, the combination, with a base, A, of standards B C, a bifurcated lever H, connected by chains G, with lugs formed on the sleeve 1], a tube, D, arranged within said sleeve, the tube and sleeve being arranged on the standard 0, an arm, L, loosely connected to the base A, and formed with a shoulder, N, substantially as described.

4-. In a wagon-jack, the combination, with a H. Lnn BURnIoK, MARTIN N. CnUneInLL. 

